Information of simulation logs

[chalseokim]

In the latest webinar(Simulation Phase Webinar 4), we checked the contents of our simulation logs.
And we have a few more questions about the simulation logs information.

1. When can we download logs after submitting our solution files?
2. What kind of information is contained in the logs?
3. How can we utilize the 'state.tlog'? What is the difference between rosbag and tlog files?
4. Is it possible to extract the simulation logs on our own?

It would be very helpful if you let me know the site where I can get help with the questions.
Thank you.

[iche033]

When can we download logs after submitting our solution files?

Runs are manually triggered. They will be available after we completed your run. It may take a day or so.

What kind of information is contained in the logs?

It's a simulation log file (in sqlite3 db format). It contains poses of all entities in simulation over time. The simulator uses this log file to playback the entire run.

How can we utilize the 'state.tlog'? What is the difference between rosbag and tlog files?

You can playback the log files by following the instructions in this wiki page:
https://github.com/osrf/mbzirc/wiki/Simulation-logs

It is similar to how rosbag works in a way that it records data from topics. However, it records data from specific ignition topics that are only meant for use by our simulator.

Is it possible to extract the simulation logs on our own?

Do you mean generate your own simulation log files locally? Yes, they should already be generated every time you run the simulation locally. The logs are stored in in /tmp/ign

It would be very helpful if you let me know the site where I can get help with the questions.

You can post your questions in our issue tracker. If you have received an email with your dry run results and have any questions related to your dry run. You can ask questions by replying to that email.